\chapter{Acronyms \& Abbreviations}

\section{List of Acronyms and Abbreviations }

\begin{tabular}{ll}
DSL &  Digital Subscriber Line \\
GPL GNU & General Public License \\
IP & Internet Protocol \\
IP PBX  & Internet Protocol Private Branch Exchange \\
ISP & Internet Service Provider \\
L3DGE & Leveraging 3D Game Engines \\
LAMS & L3DGEWorld Asterisk Management System \\
LCMON & L3DGEWorld Cluster-node Monitoring \\
MGCP &  Media Gateway Control Protocol \\
OECD  & Organisation for Economic Co-Operation and Development \\
PSTN & Public Switched Telephone Network \\
QoS & Quality of Service \\
RTP & Real Time Protocol \\
SIP & Session Initiation Protocol \\
Skinny or SCCP &  Skinny Call Control Protocol \\
Telco & Telecommunications Company \\
UAC & User Agent Client \\
UAS & User Agent Server \\
UDP & User Datagram Protocol \\
VoIP & Voice over Internet Protocol \\
VPN & Virtual Private Network \\
VSP & VoIP Service Provider 
\end{tabular}